/euh seet'l sis"tee een', -in, euh set'-, as'i tl-/ , n. Pharm.
a substance, C 5 H 9 NO 3 S, used in solution as an inhalant to dissolve mucus in the treatment of chronic bronchitis, asthma, and emphysema and also used as an antidote in acetaminophen poisoning.
[ ACETYL + CYSTEINE ]